Stem eric ericson



No. 62!,300. Patented Mar. l4, I899. s. E. ERIGSON.

VALVE 000K.

(Application filed Oct. 14, 1898.)

(No Model.)

NrrED STATES S'IEN ERIC ERICSON, OF STOCKHOLM, SNVEDEIV.

VALVE- COCK.

SPECIFICATION forming part of Letters Patent No. 621,300, dated March 14, 1899.

Application filed 0ct0lier14,1898. Serial No. 693,527. (No model.)

To aZZ whom it may concern.-

Be it known that I, SrnN ERIC ERIOSON, a subject of the King of Sweden and Norway, and a resident of Bryggaregatan 2 Stockholm, Sweden, have invented a new and usefulImprovementin Valve-Cocks, of which the following is a specification, reference being had to the drawings accompanying and forming a part thereof.

The invention relates to such valve-cocks as are provided with double valves, and especially to that class of valve-cocks in which the valve-openin g is perpendicular, or nearly so, to the direction of the flow in the conduitpipe-as, for instance, stop or tap valves for water-pipes and such like. In these valvecocks as hitherto constructed the secondary valve, which by fully'opening of the main valve closes the valve-opening, has been actuated by a spring, by means of which the secondary valve was constantly pressed against its seat opposite the main valve. This construction has the disadvantage that rust or other substances are liable to collect upon the secondary valve, because the latter by the spring is firmly pressed to its seat, when the main valve is closed. Another disadvantage consists therein that the valve usually has two stopping positions, whereby a person using the valve may close the valve by means of the secondaryvalve when the packing of the main valve is outworn. The consequence thereof is that also the packing of the secondary valve often is worn out before the main valve is repaired. The secondary valve is in such cases useless for the purpose for which it was provided.

The object of myinvention is a valve-cock having none of the said disadvantages. To this end I construct the Valve-cock so that the secondary valve will always be moved when a current of water passes through the valve and so that the secondary valve does not close the valve-opening before the main valve is partly unscrewed.

Referring to the accompanying drawings, Figure 1 is a vertical and Fig. 2 a horizontal section of a stop-valve for water-pipes, showing by way of example one way of carrying out my invention.

In the instance illustrated there is in the lower part of the casing a an inner casing b, which at or near the bottom is provided with openings 0, through which the water of cur rent must pass. The secondary valve f is arranged in the casing 11 in such a manner that the current of water entering through the openings 0 always strikes the under side of the valve f and thereby lifts the same. The valve f is provided with downwardly-projecting arms f, which slide on the inside of the casing Z) and thus guide the valve f when the latter is moved up and down. I also make the shortest distance between the two valves f and g so great as to prevent the secondary valve f from reaching its seat It and closing the valve-opening unless the main valve g is partly unscrewed. The valves f and g are simultaneously fully open, and as a rule the valve-opening cannot be closed by the secondary valve; but when the main valve is unscrewed or taken away the secondary valve will reach its seat and close the valve-opening, so as to retain the water and prevent detrimental shocks in the conduits. The closing takes place ere the main valve is fully unscrewed or disengaged.

When a tap-valve is opened, so that water flows through the stop-valve, the water enters at first the space at between the casings a and b and passes then through the openings 0, thereby pushing the valve f upward against the stem g, projecting downward from the under side of the main valve g. The valve f does, however, not remain in this position, but it is put in oscillating motion by the water-current and falls again down to the bottom of the casing a, when the flow of water ceases.

In the water-conduit of abuilding the stopvalve is usually open and the secondary valve fhas the position shown in Fig. 1, when no current passes through the Valve. By opening one or more tap-valves in the building the valve f is lifted. By closing all the tapvalves the valve f drops down.

The openings 0 in the wall of the casing b are preferably provided with close wire-netting, or instead of the openings 0 I sometimes use strains with small openings, thus preventing rust and other solid bodies from passing through the stop-valve into the branches of the conduit in the building.

The application of invention to tap-valves is obvious and needs no illustration.

Having now described my invention and how it may be carried out, I claim 1. The combination with a valve-cock having a secondary valve adapted to close the valve-opening when' the main valve is fully open, of a secondary casing inclosing the secondary valve and provided beneath the latter with openings through which the fluid passes, substantially as and for the purpose set forth.

2. In valve-cocks having a secondary valve which will be moved from its seat every time the main valve is closed, the combination with the said valves of a stem between the'valves of such length as to prevent the secondary 20 STEN ERIC ERICSON.

\Vitnesses:

AUG. SoRENsEN, A. S. DAHL. 

